#!/usr/bin/env bash
# Pre-commit hook: enforce 10-line net addition limit
# Install: git config core.hooksPath .githooks

ADDITIONS=$(git diff --cached --numstat | awk '{s+=$1} END {print s+0}')
DELETIONS=$(git diff --cached --numstat | awk '{s+=$2} END {print s+0}')
NET=$((ADDITIONS - DELETIONS))

if [ "$NET" -gt 10 ]; then
  echo "BLOCKED: Net addition is $NET lines (max: 10)."
  echo "  Delete code elsewhere to compensate."
  exit 1
fi

echo "✓ Pre-commit: net $NET lines (limit: 10)"